Small computer system emulator for non-local SCSI devices
First Claim
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1. A computer network system of two computers having BIOS software dependency wherein the first computer accesses a remote peripheral device of the second computer, comprising:
- a first computer including a first Small Computer System Interface (SCSI) adapter;
a second computer including a second SCSI adapter with at least one remote peripheral device;
a SCSI bus communications link between the first and second SCSI adapters; and
memory resident emulation means in the second computer emulating a SCSI remote peripheral device for direct access of the SCSI remote peripheral device by the first computer and emulating a non-SCSI remote peripheral device for direct access of the non-SCSI remote peripheral device by the first computer upon command by the first computer and providing for proper sharing of any BIOS software interrupt which supports remote peripheral device access by both the first and second computers upon command by the first computer such that proper hardware and software priority operation is maintained and providing synchronization procedures to preclude BIOS software interrupt recursion.
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Abstract
A SCSI computer system is provided whereby a host computer gains access to a targeted but non-local peripheral device, which device or devices are individually responsive to either SCSI or non-SCSI commands, by sending SCSI commands via a SCSI bus to a connected SCSI target computer which emulates the targeted peripheral device local to the SCSI target computer, whether the targeted peripheral device is responsive to only SCSI or only non-SCSI commands, to cause the targeted peripheral device to carry out the initial SCSI commands.
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1 Claim
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1. A computer network system of two computers having BIOS software dependency wherein the first computer accesses a remote peripheral device of the second computer, comprising:
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a first computer including a first Small Computer System Interface (SCSI) adapter; a second computer including a second SCSI adapter with at least one remote peripheral device; a SCSI bus communications link between the first and second SCSI adapters; and memory resident emulation means in the second computer emulating a SCSI remote peripheral device for direct access of the SCSI remote peripheral device by the first computer and emulating a non-SCSI remote peripheral device for direct access of the non-SCSI remote peripheral device by the first computer upon command by the first computer and providing for proper sharing of any BIOS software interrupt which supports remote peripheral device access by both the first and second computers upon command by the first computer such that proper hardware and software priority operation is maintained and providing synchronization procedures to preclude BIOS software interrupt recursion.
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Specification
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Current AssigneeInternational Business Machines Corporation
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Original AssigneeInternational Business Machines Corporation
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InventorsWachtel, Edward I., McNeill, Andrew B. Jr.
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Primary Examiner(s)Bowler, Alyssa H.
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Assistant Examiner(s)NGUYEN, DZUNG C
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Application NumberUS08/263,168Time in Patent Office630 DaysField of Search395/800, 395/500, 364/DIG. 1, 364/228, 364/280, 364/280.9, 364/284.2, 364/DIG. 1US Class Current703/24CPC Class CodesG06F 13/102 where the programme perform...G06F 13/385 for adaptation of a particu...
